IBM 201 manual Device/Problem, Symptom, Suggested action, Monitor, NAS 200 User’s Reference

Table 5. Engine troubleshooting symptoms and suggested actions (continued)

Device/Problem	Symptom	Suggested action
Monitor	Testing the monitor.	Some IBM monitors have their own self-tests. If you suspect a
		problem with your monitor, refer to the information that comes
		with the monitor for adjusting and testing instructions.
		If you still cannot find the problem, call for service.
	The screen is blank.	Verify that:
		1. The appliance power cord is plugged into the appliance and a
		working electrical outlet.
		2. The monitor cables are connected properly.
		3. The monitor is turned on and the Brightness and Contrast
		controls are adjusted correctly.
		If the items above are correct and the screen remains blank, call
		for service.
	Only the cursor	Call for service.
	appears.
	The monitor works	Verify that:
	when you turn on the	1. The primary monitor cable is connected to the video port.
	appliance, but goes
		2. You installed the necessary device drivers for the applications.
	blank when you start
	some application	If the items above are correct and the screen remains blank, call
	programs.
		for service.
	Wavy, unreadable,	If the monitor self-tests show the monitor is OK, consider the
	rolling, distorted screen,	location of the monitor. Magnetic fields around other devices
	or screen jitter.	(such as transformers, appliances, fluorescent lights, and other
		monitors) can cause screen jitter or wavy, unreadable, rolling, or
		distorted screen images. If this happens, turn off the monitor.
		(Moving a color monitor while it is turned on might cause screen
		discoloration.) Then move the device and the monitor at least 305
		mm (12 in.) apart. Turn on the monitor.
		Notes:
		1. To prevent diskette drive read/write errors, be sure the
		distance between monitors and diskette drives is at least 76
		mm (3 in.).
		2. Non-IBM monitor cables might cause unpredictable problems.
		3. An enhanced monitor cable with additional shielding is
		available for the 9521 and 9527 monitors. For information
		about the enhanced monitor cable, see your IBM reseller or
		IBM marketing representative.
		If the problem remains, call for service.
	Wrong characters	If the wrong language is displayed, update the BIOS with the
	appear on the screen.	correct language.
		If the problem remains, call for service.

54NAS 200 User’s Reference